Honda transmission code

A friend had an exhaust put on a 98 Civic yesterday. 4 cylinder.
Automatic. Now the car won’t shift right.

She took it back to the exhaust shop and they scanned it. It says:
Transmission control system malfunction.

Has anyone seen this before? Something serious or maybe a bad sensor?

seems to be a common honda problem with those sensors going bad on Auto trannies. i have a 92-95 auto tranny sensor but i doubt they’re the same. Anyone know?

-This is probably gonna get deleted since they’re not a sponsor :kekegay: but …call Best Foreign (724-375-8686) and see how much a used one is.

Thanks.

I found this, too: Car Maintenance, Repairs, & How-Tos
Maybe a bad linear solenoid. :dunno: